Tiberius III of Byzantium

Tiberius III of Byzantium (665-15 February 706) was the Emperor of the Byzantine Empire from 698 to 705, succeeding Leontios of Byzantium and preceding Justinian II of Byzantium.

Biography
Tiberius was born to the House of Apsimaros, and he was a Germanic naval officer from Pamphylia. In 698 he took part in the failed attempt to regain Carthage from the Umayyad Caliphate, and he replaced Admiral John the Patrician, who was murdered while returning to Crete from Carthage. His fleet diverted to the capital of Constantinople, where he seized control of the Byzantine Empire. He strengthened the defenses of Anatolia against the Umayyad Caliphate and won minor victories while raiding northern Syria in 700 and 701, and in 703 and 704 the Arabs suffered heavy losses while invading Cilicia. In 706 the previously-overthrown emperor Justinian II of Byzantium and an army of 100,000 Bulgars and Slavs retook Constantinople and Tiberius was beheaded.